Jannik Sinner with Rafael Nadal, the answer is here

Jannik Sinner and Rafael Nadal
Jannik Sinner, due to his suspension for the Clostebol case, will not even be able to train with professional tennis players in the coming weeks, on pain of disqualification for the latter as well if they are caught working on the court with the South Tyrolean.
That's why after Saturday's announcement there was even talk of an exceptional sparring partner such as Rafa Nadal, who has just retired and is therefore free of any official ties.
Benito Barbadillo, the Mallorcan’s historical manager who has followed him throughout his very long career, has, however, denied this hypothesis from the pages of Il Messaggero: "He hasn’t touched the racket for 3 months".
As a coach, not only in this period but also for the post-Cahill period, the name of Carlos Moya è was mentioned. "For me è the best ever", Barbadillo himself pointed out.